Alkallas Fatemah H, Gouider Trabelsi Amira Ben, Almugren K S, Rabia Mohamed
Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia.
Nanomaterials Science Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
Sci Rep. 2025 Sep 12;15(1):32434. doi: 10.1038/s41598-025-16333-6.
A novel BiMoO-BiO/P1HP core-shell (C-S) nanocomposite photocathode has been successfully synthesized using a two-step process, resulting in a unique mushroom-like morphology with rough, agglomerated structures (~ 200 nm). XRD analysis confirms its nanoscale crystallite size (~ 35 nm), while optical studies reveal broad absorption extending from the visible to infrared range, with an optimized bandgap of 1.75 eV. The photocathode demonstrates exceptional hydrogen production efficiency when applied for H₂ generation using sanitation water as an electrolyte. A high hydrogen evolution rate of 2.5 µmol h cm is achieved, with current density (J) measurements confirming its strong performance under various lighting conditions. Under full-spectrum white light, J reaches - 0.45 mA/cm², while at 340 nm, it remains stable at -0.42 mA/cm², indicating consistent activity across different wavelengths. These findings highlight the dual benefits of this nanocomposite: efficient, eco-friendly hydrogen production while repurposing wastewater. With its broad optical absorption, cost-effective fabrication, and high photocatalytic efficiency, this innovative photocathode emerges as a promising solution for sustainable hydrogen generation.
一种新型的BiMoO - BiO/P1HP核壳（C - S）纳米复合光阴极已通过两步法成功合成，形成了具有粗糙、团聚结构（约200纳米）的独特蘑菇状形态。X射线衍射分析证实了其纳米级微晶尺寸（约35纳米），而光学研究表明其具有从可见光到红外范围的广泛吸收，优化后的带隙为1.75电子伏特。当使用卫生用水作为电解质用于产生氢气时，该光阴极表现出卓越的产氢效率。实现了2.5微摩尔/小时·平方厘米的高析氢速率，电流密度（J）测量证实了其在各种光照条件下的强大性能。在全光谱白光下，J达到 - 0.45毫安/平方厘米，而在340纳米处，它保持在 - 0.42毫安/平方厘米稳定，表明在不同波长下具有一致的活性。这些发现突出了这种纳米复合材料的双重益处：高效、环保的产氢同时将废水再利用。凭借其广泛的光吸收、经济高效的制备以及高光催化效率，这种创新的光阴极成为可持续制氢的一个有前途的解决方案。
